Relay



Aug. 29, 1939. E. BGRGKVIST RELAY Filed Jan. 6, 1937 INVENTOR. H/V/Z'E BOEGA/V/ST Z Z ATTORNEYS Patented Aug. 29, 1939 UNITED STATES PATENT OFFICE Claims.

The presentinvention is directed to a relay switch in which the various parts of the switch are so arranged as to enable a quick assembly of the switch. In actual practice, it has been found 5 commonly expedient to have the individual parts of the switch bear. such a relationship to each other so that they mayeasily be assembled, thus creating a considerable savings in time during the process of manufacture.

A further object of the invention is present in the compact arrangement of the various parts which results in a relay that will take as little space as possible. A savings in space has been accomplished especially in that part of the relay which comprises the switch portion for closing an external circuit. This advantage of compactness is naturally important wherever the question of space requirements may enter,

A further object of the invention lies in the few and simple parts which are necessary to the complete organization of the switchrelay, which becomes a material factor as far as cost for the manufacture of such relays is concerned.

Further and other important objects will be apparent as the description of the invention proceeds as illustrated in the following figures:

Figure 1 is an elevational view in section of the switch relay showing details of the interior constructions;

Fig. 2 is a partial view in side elevation of Fig. 1 looking toward the left;

Fig. 3 is a plan view of Fig. 1;

Fig. 4 is a sectional plan view taken through the plane 4-14 of Fig. 1; and

Fig. 5 is a sectional plan view through the plane 65 of Fig. 2.

In the embodiment of the invention illustrated, an outer casing I. of insulating material, preferably pressed fiber, houses the relay and switch mechanism. A reel comprising a hollow-core or inner tubing 3| of insulating material and end flanges I, 32, has wound upon it thermagnetic coil 2 as in "ordinary magnetic coil constructions. Within the tubing 3| is a solenoid rod or armature 3 which is preferably of cold-drawn steel. Attached tothe solenoid rod} by a pin 9 is a portion 8 of brass rod (or other suitable non-magnetic material). The purpose of the portion 8 of the rod is to give sufficient weight to the armature so that in normal position with the magnetic coil 2 deenergized or only slightly magnetized, the solenoid rod 3 will assume the lower position shown in Fig. 1.- Fixed to the brass rod 8 is a brass headed pin H for slidably supporting the disc Ill. The member III is normally. held taken against the head of the pin H by means of an intermediate spring l2 bearing on the brass rod 8 and the member I 0. The member In may be constructed as a disc, as shown in the drawing, or may consist of a transverse bar or some other element adapted to be reciprocated longitudinally in the housing.

As shown in Figs. 4 and 5, the disc ID has affixed thereto as by a pressed engagement the contact points 29 and 30. These contact points are preferably of silver. The disc 10 also has apertures l3 and M as shown in Fig. 1 which aid to properly guide the movement of the disc.

The top of the housing I is closed by an end cap structure. This end cap structure comprises the outer disc l9 and the inner disc 20, each of which is made of insulating materials such as fiber. The discs l8 and 20 are connected together as a unit by means of metallic eyelets l7 and I8. Surrounding the eyelets I1 and I8 and positioned between the discs l9 and 20 are the insulating washers 33 and 34. The ends of the eyelets l1 and I8 are pressed over as illustrated in Fig, 1 so as to form a permanent connect-ion. Extended through the eyelets l1 and I8 are headed guide pins l5 and [6. These pins are preferably made of brass and extend into the apertures l3, M of the disc [0. The heads of the pins l5, l6 may be fixedly attached to the eyelets. l1 and I8 by means of solder or other well known connecting means. The inner disc 20 has mounted thereon a second pair of eyelets 25 and 26 as shown in Fig. 2. These eyelets are preferably made of brass and are bent over as shown in Fig. 2 to receive the terminals of wires 22, 23 of an external circuit. The ends of the wires 22. 23 are held in position by the overlapping edge of the eyelets, although if necessary soldering may be employed to have a strong connection. Contact points 21 and 28 made of silver, are pressed into fixed engagement with the eyelets as shown in Fig. 2 and are normally positioned above the contacts 29 and 30. The inner disc 20 also has a central aperture 25 positioned directly above the head of the pin ll.

It will be understood that the invention is not necessarily restricted to guide means as described but may be of other description within the scope of the appended claims.

The end cap structure may be threaded into the, end of the housing I by means of threads, such as 2i of Fig. 1, or may merely have a pressed relationship with the outer housing structure I. The base of the housing I hasan insulating closure 6 for the bottom of the core 3|. Lead-in wires Fig. 1.

l and 5 are connected to the magnetic coil 2 in the customary manner- The assembly of the relay switch mechanism is exceedingly simple, in so far as it is necessary to merely remove the end cap structure in the form of washers l9 and 20. The armature 3 and its associated disc Ill are then inserted within the housing I and assume the position shown in With the armature so positioned, the end cap structure is replaced thus forming the complete relay switch mechanism.

In the operation of the device with the relay assuming a vertical position as shown in Fig. 1, the armature 3 normally assumes a lower position as shown. When the magnetic coil 2 is sufficiently energized, the armature rod 3 is lifted upwardly until the contact points 29 and 30 on the disc i0 engage the contact points 21 and 28 on the end cap structure. Such engagement of contact points completes the external circuit of wires 22, 23. After the engagement of the contact points, the rod 3 may continue its upward movement slightly so that the head of the pin II will move independently of the disc l0 intothe space created by the opening in'disc 20. When the magnetic coil 2 becomes sufliciently deenergized, the armature rod 3 due to its own weight and the weight of the section 8 will drop into its lower position, as shown in Fig. 1. The purpose of the guide pins l5, l5 and the apertures l3, I4 is quite obvious in so far as they prevent any rotary movement of the disc it which would disaline the contact points 21, 28 with respect to the contact points 29 and 30.

The particular construction of the end cap with the eyelets positioned as shown enables a very compact switchstructure. Also the arrangement of the switch disc member ID and its relationshi to the armature rod 3 and end cap structure 19, 20 makes a more compact arrange- .ment. The device is simple in its arrangement of parts and has been found commonly expedi:

ent.

It is not myintention to limit the present invention to the preferred embodiment illus-- trated, but rather to include all equivalent structures as covered by the scope of the following claims.

I claim as my invention:

1. In a relay of the class described, having a magnetic coil for actuationof an armature rod, both of which are encased within an insulated housing, the combination of a disc connected to said rod at one end, an end cap for the housing comprising a pair 01 inner and outer insulating dscs the inner disc hearing switch points and the outer disc bearing guide pins, apertures in the disc to receive the guide pins, and switch points, on the disc to engage the switch points on the inner disc of the end cap when the magnet coil is sufliciently energized.

'2. In a relay of the class described, having a magnetic coil for actuation of an armature rod, both of which are encased within an insulated housing, the combination of a headed Pin fixed-to one end of the rod, a switch disc slidably mounted for longitudinal movement only on said pin, means for yieldably holding the disc against the head of the pin, an end cap for the housing comprising a pair of inner and outer insulating discs the inner disc bearing switch points and the outer discbearing guide pins, apertures in said switch disc to receive the guide pins, and switch. points on said switch disc to engage the switch points on the inner disc of the end cap when the magnet coil is sufliciently energized.

3. In a relay of the class described, having a magnetic coil for actuation of an armature rod,

both of which are encased within aninsulated housing, the combination of a'headed pin fixed to one end of the rod, a switch disc slidably mounted for longitudinal movement only on said pin, a spring mounted on the pin interposed between the armature and the disc for yieldably holding the disc against the head of the pin, an

end cap for the housing comprising a pair of 4. In a relay of the class described, having a magnetic coil for actuation of an armature rod, both of which are encased within an insulated housing, the combination of a headed pin fixed to one end of the rod, a switch disc slidably mounted for longitudinal movement only on said pin, means for yieldably holding the said switch against the head of the pin, an end cap for the housing comprising a pair of inner and outer insulating discs,'the inner disc bear ing switch points and the outer disc bearing guide pins, apertures in said switch disc to receive the guide pins, switch points on said switch disc, and an aperture in the end cap for receiving the head of pin when the switch points on the disc engage the switch points on the inner disc .of the end cap.

5. An end cap for a relay switch device, comprising inner and outer insulating discs, a pair of eyelets for connecting said discs, a guide pin positioned through each eyelet and afiixed thereto, a second pair of eyelets attached to the in- .of eyelets for connecting said discs, insulating washers surrounding the eyelets for spacing the discs, a guide pin positioned through each eyelet and afiixed thereto, a second pair of eyelets at tached to the inner disc only, contact points and circuit connections attached to the latter eyelets.

7. An end cap for a relay switch device, comprising inner and outer insulating discs, said inner disc being centrally apertured, a pair of eyelets for connecting said discs, a guide pin positioned through each eyelet and aflixed thereto, a second pair of eyelets attached to the inner disc only, contact points and circuit-connections attached to the latter eyelets.

8. In a relay of the class described having a magnetic coil for actuation of an armature rod, both of which are encased within an insulated housing, the combination of a. switch disc yieldingly connected to said rod for longitudinal movement only, an end cap for said housing comprising a pair of inner and outer insulating discs, the inner disc bearing switch elements and the outer disc bearing guide means, said guide means being associated with the said switch disc for preventing rotation of the letter.

9. In a relay of the class described having a I ingly connected to said rod for longitudinal movement only, switch points aflixed to said switch disc, an end cap for said housing comprising a pair of inner and outer insulating discs. the inner 'disc bearing switch points and the outer disc bearing guide means, said guide means being associated with said switch disc for positively aligning the switch points.

10. In a relay oi the class described having 10 a magnetic coil for actuation of an armature rod,

both of which are encased within an insulated housing, the combination of a switch member yieldingly connected with said rod for longitudinal movement only, an end-cap for said housing havingguide means for guiding said switch member to prevent rotation thereof and com- 

